影响水中溶解氧测定的因素有哪些?
什么是溶解氧计(DO)?溶解氧是测量水中所含气态氧的量。能维持生命的健康水必须含有溶解氧(dissolved oxygen)。溶解氧通过直接从大气中吸收进入水中。风、浪、海流或机械通气引起的快速运动。水生植物生命光合作用过程的副产品。什么因素会影响水中溶解氧的测量?大气压力传感器:较高的大气压力允许水体保留更多的溶解氧。来自上方的压力使水能够容纳更多的氧分子。因此，由于大气压力较低，溶解氧浓度通常在高海拔地区较低。温度:温度较低的水体可以含有更多的溶解氧，因为氧分子的运动较少。氧分子在温暖的水中运动增加，使它们能够从水中逸出到空气中。水的深度:水越浅，溶解氧的浓度越高，因为在水面上产生波浪的风会增加溶解氧，而且生活在较浅的充满光的水中的水生植物会产生溶解氧，这是光合作用的副产品。盐度:较低的盐度有助于提高溶解氧的浓度，因为盐会影响气体的溶解度，从本质上把它们赶出水中。生物活性:水中微生物的生物活性降低导致溶解氧浓度升高，因为以有机物和腐烂物质为食的微生物在呼吸时需要氧气。为什么要监测水中的溶解氧?Measuring dissolved oxygen in water and treatment to maintain properly dissolved oxygen sensors, are crucial functions in a variety of water treatment applications. While dissolved oxygen is necessary to support life and treatment processes, it can also be detrimental, causing oxidation that damages equipment and compromises the product. Dissolved oxygen affects:Quality: The Dissolved oxygen concentration determines the quality of source water. Without enough Dissolved oxygen, the water turns foul and unhealthy affecting the quality of the environment, drinking water, farming, agriculture, and others.Regulatory Compliance: To comply with regulations, industrial wastewater treatment often needs to have certain concentrations of Dissolved oxygen before it can be discharged into a stream, lake, river, or waterway. Healthy waters that can support life must contain dissolved oxygen.Process Control: Dissolved oxygen levels are critical to controlling the biological treatment of wastewater, as well as the biofiltration phase of drinking water production. In some industrial applications (e.g. power production) any Dissolved oxygen is detrimental for steam generation and must be removed and its concentrations must be tightly controlled.At BOQU water quality analyzer Instrument, find the water quality meter monitoring equipment, resources, training, and software you need to successfully monitor and manage dissolved oxygen levels in your specific process application. DOG-2082YSoptical Dissolved Oxygen Controller DOG-2092ProDissolved Oxygen Meter DOG-2082ProDissolved Oxygen Analyzer DOG-208Fppb Class dissolved oxygen probe DOG-208FAHigh Temperature (130C) dissolved oxygen sensor BH-485-DODigital RS485 Dissolved Oxygen Electrode
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